What is a fathom (US survey)?

It is a non-SI unit of length equal to 6 US survey feet, used mainly in nautical and hydrographic contexts to measure water depths and line lengths.

Why convert fathoms to millimeters?

Converting to millimeters provides precise metric measurements suitable for engineering, mapping, and scientific analyses requiring sub-centimeter accuracy.

Can I use this tool for international fathom conversions?

No, because the US survey fathom slightly differs from the international fathom; this tool specifically converts the US survey fathom to millimeters.

How to Convert from Fathom (US survey) [fath] to Millimeter [mm]?

Convert length measurements from fathom (US survey) to millimeter accurately using this unit converter. Ideal for nautical, hydrographic, and engineering applications.

Fathom (US survey) [fath]

Millimeter [mm]

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Fathom (US survey) [fath] to Millimeter [mm] Conversion Table

Fathom (US survey) [fath]	Millimeter [mm]

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Fathom (US survey) [fath] to Millimeter [mm] Conversion Table
Fathom (US survey) [fath]	Millimeter [mm]

Explore More Length Units Converter

What Is This Tool?

This tool converts length units from fathom (US survey), a traditional maritime measurement, to millimeters, an SI unit used for precise, sub-centimeter scale measurements. It facilitates transforming nautical data into detailed metric units for engineering, mapping, and scientific uses.

How to Use This Tool?

Enter the length value in fathoms (US survey) you wish to convert
Select fathom (US survey) as the input unit and millimeter as the output unit
Click or tap the convert button to get the result in millimeters
Use the converted value for precise engineering, mapping, or nautical applications

Key Features

Converts fathom (US survey) lengths to millimeters seamlessly
Based on exact conversion rate: 1 fathom = 1828.8036576073 millimeters
Supports maritime, hydrographic, and engineering length conversions
Browser-based and easy to use for quick calculations
Allows converting legacy hydrographic survey data to modern metric units

Examples

3 fathoms (US survey) equals 5486.411972822 millimeters
0.5 fathom (US survey) converts to 914.40182880365 millimeters

Common Use Cases

Recording water depths and soundings on historical or legacy hydrographic surveys
Specifying lengths of anchor cables or mooring lines in maritime contexts
Converting legacy US survey fathom measurements to metric units for modern projects
Engineering and CAD work requiring precise length dimensions in millimeters

Tips & Best Practices

Be mindful not to confuse US survey fathoms with international fathoms due to slight differences
Use the converted millimeter values for precise, detailed measurements in engineering and manufacturing
Check original survey data for rounding that could affect conversion precision
Consider the large numeric values millimeter units can create when converting fathoms

Limitations

US survey fathom differs slightly from the international fathom, which may affect conversions
Large numeric millimeter values may be cumbersome for some applications
Rounding in original fathom data can limit precision in converted millimeter values

Frequently Asked Questions

What is a fathom (US survey)?: It is a non-SI unit of length equal to 6 US survey feet, used mainly in nautical and hydrographic contexts to measure water depths and line lengths.
Why convert fathoms to millimeters?: Converting to millimeters provides precise metric measurements suitable for engineering, mapping, and scientific analyses requiring sub-centimeter accuracy.
Can I use this tool for international fathom conversions?: No, because the US survey fathom slightly differs from the international fathom; this tool specifically converts the US survey fathom to millimeters.

Key Terminology

Fathom (US survey): A length unit equal to 6 US survey feet, used in maritime and hydrographic measurements.
Millimeter (mm): An SI derived length unit equal to one thousandth of a meter, used for precise small-scale measurements.
US survey foot: A unit of length in the US survey system, where 1 fathom equals 6 US survey feet.

Quick Knowledge Check

What does 1 US survey fathom equal in millimeters?

Exactly 1800 millimeters

1828.8036576073 millimeters

About 1850 millimeters

Which context primarily uses fathom (US survey)?

Astronomy measurements

Nautical and hydrographic measurements

Textile industry dimensions

What should be considered when converting from fathoms to millimeters?

Differences between US survey and international fathoms

Conversion to feet first

Using fathoms only for land measurements

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